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Gastroenterology. 2003 Aug;125(2):364-71.

A proinflammatory genetic profile increases the risk for chronic atrophic gastritis and gastric carcinoma.

Author information

1
Institute of Molecular Pathology and Immunology of the University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal. josem@ipatimup.pt

Abstract

BACKGROUND & AIMS:

Pro-inflammatory polymorphisms within the genes interleukin (IL)-1B and IL-1RN are associated with risk for gastric carcinoma (GC) in Helicobacter pylori-infected individuals. We aimed to determine the association between variation of the tumor necrosis factor (TNF)-alpha gene and the risk for chronic atrophic gastritis (CAG) and GC. We also investigated the extent to which the combined effect of proinflammatory genetic polymorphisms (IL-1B, IL-1RN, and TNF-alpha), and the combined effect of TNF-alpha and bacterial genotypes each influence such a risk.

METHODS:

In a case-control study including 306 controls, 221 individuals with chronic gastritis, and 287 GC patients, the TNF-alpha-308 and IL-1B-511 bi-allelic polymorphisms, the IL-1RN variable number of tandem repeats (VNTR), and the H. pylori genes vacA (s and m regions) and cagA were genotyped.

RESULTS:

We found that carriers of the TNF-alpha-308*A allele are at increased risk for GC development with an odds ratio (OR) of 1.9 (95% confidence interval [CI], 1.3-2.7). For both CAG and GC, the odds of developing disease increased with the number of high-risk genotypes. Individuals carrying high-risk genotypes at the 3 loci are at increased risk for CAG and GC with an OR of 5.8 (95% CI, 1.1-31.0) and 9.7 (95% CI, 2.6-36.0), respectively. The risk for GC was not affected significantly by the combination of bacterial and TNF-alpha-308 genotypes.

CONCLUSIONS:

These findings show that a proinflammatory polymorphism in the TNF-alpha gene is associated with increased risk for GC, and that it is possible to define a specific genetic profile associated with highest risk for CAG and GC.

PMID:
12891537
DOI:
10.1016/s0016-5085(03)00899-0
[Indexed for MEDLINE]

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